What is nutrition?
BiologyClass 10CBSEAnswered 28 May 2026
Answer
Nutrition is the process by which organisms obtain and utilize food for energy, growth, repair, and body maintenance.
| Mode | Description | Examples |
|---|---|---|
| Autotrophic | Makes own food | Plants (photosynthesis) |
| Holozoic | Ingests solid food | Humans, lions |
| Saprophytic | Absorbs from dead matter | Fungi |
| Parasitic | Feeds on a living host | Tapeworm |
In humans: ingestion → digestion → absorption → assimilation → egestion.
Nutrition is how organisms obtain food either by making it themselves or consuming others to sustain all body functions.
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